Chen Jin, the former peak combat force of the "Hidden Dragon" special forces, codenamed "Long Yuan", retired after being framed for a top-secret border mission and hid in the coastal metropolis "Haizhou City". All that remains in his hand is a mysterious dragon badge, a killing skill and the scattered whereabouts of three deceased comrades. He changed his name to "Chen Mo" and became the owner of a dilapidated auto repair shop, but he walked around the intersection of light and darkness in the city with another identity late at night.
